Method of manufacture of packing



Aug. 18, 1959 H. HAIDEGGER METHOD OF MANUFACTURE OF' PACKING originalFiled March 1. 1954 FIGA FIGB

FIGJ

INVENTOR HANS HmnEER UnitedStates Patent C Baienled Ausf 18, 195.9

,2,899,732 METHOD on MANUFACTURE F PACKING HansHaideggr, Soleure,Switzerland, assignor to .Ebauches, QS.A., Neuchatel, SwitzerlandOriginal application March 1, 1954, Serial No. 413,330. 16),]igidgd andthis application July 10, 1 957, Serial No.

3 claims. v(c1. ss-A-14) The present invention relates to a packing andto a method of manufacture'of same and this application is a division ofmy Aearlier application filed March 1, 1954 for Packing and MethodofManufacturing Same, Serial No. 413,330. v l i Y One of the. objects ofthe invention is to provide packing which is readily provided with apartition member.

Another object of the invention is to provide a method of making apacking.

Another object of the invention is to provide a method of cutting andpositioning of a partition member in a packing.

Other objects and advantages of the invention will be apparent from thefollowing description and from the accompanying drawing.

The invention accordingly consists inthe features of construction,combinations of elements, and` arrangements of parts, all as will beillustratively described herein, and the scope of the application ofwhich will be indicated in the following claims.

Other objects and advantages of the inventionwill be apparent from thefollowing description and from Vthe accompanying drawing, which shows,by way of example, an embodiment of the invention.

In the drawing: A

Figure 1 is a perspective View of the packing.

Figure 2 is a top view of thepacking.

Figure 3 is a side view vat an enlarged scale of the packing made inaccordance with the invention.

Figure 4 is a vertical sectional view taken` along the line 4-4 ofFigure 2.

Figure 5 is a bottom view of the 4end male die for cutting a partitionmember or spacer of the packing from a sheet form,

Figure 6 is a view of the end male die-in direction of arrow A of Figure5, and

Figure 7 a view of the end male die in direction of arrow B of Figurey5.

rene, although any other suitable plastic material such as Plexiglas, anacrylic plastic or other material might be used which does not evolvevapors during 4storage lor during a heat-sealing operation, rwhich doesnotfotherwise act so as to corrode or rust thestored parts. The bodymember 2 is molded'for instance by injection t a temperature forinstance about between 135 and 150 centigrade, or drawn or pressed at atemperature for instance about between 100 and 170 centigrade to form around flat bottom 5 between 8 and 16 millimeters in diameter. Sidewall 6is inclined upwardly at an angle from 30 to 30 degrees from the verticaland is made of a height of about 6 to 1 2 millimeters. An annular flange7 extends horizontally from the top edge of the sidewall 6 a distance`between 2 and 4 millimeters. Preferably the flange 7 is square in topview to facilitate storage in boxes. 5 The'body member 2 kis from 0.2 to0.8 millimeters in thickness. The inner surfaceV of the sidewall 6 ismade with a vertically extending cylindrical wall 8 extendingIdQwIiv/,ardly between 1.0 and 4.0 millimeters'and 4ata right rangle tothe flange 7. The body member 2 is thus 10 made with a cross-sectionalshape in general bridge-truss design having great strength in proportionto the material used.

The partition member. or. Spacer 3 is preferably made .from Plexiglas,an acrylic plastic material, although' any other Vsuitable material suchas for instance acetate foil, Celluloid etc. might be used which doesnot evolve vapors or otherwise act so as ,to corrode or rust the storedparts, .especially if the material is not heated.V The spacer 3 is`iliade from a sheet of Plexiglas between 0.1 and 0.4 millimeters inthickness and of a size to fit the vertically `extending wall 8 when thespacer is bulged outwardly or inwardly with a spherical radius betweenfor instance 6i). ,and 300 millimeters. The slight bulging is given the.SRBCCI .3150 as to maintain it in position in engagement wiihthe Wall8. The spacer 3-is cut from sheet form by pressing the sheet against theupper edge of the cylindrical wall 8 with a movable end male die 17 asshown ina-Figs. 5 to 7, using the upper edge of the wall 8 of the body,2 as the female die. The end male die 17 has a cutting edge with fourhighest points 12. Each cutting edge portion 1 3 lyingbetween twoadjacent points 12 is Shaped as curve (Figs. 6 and 7). Thedistanceb'etweenpoints 12 andthe lowermost points 16 of the curves 13,measured in Ythe axial direction of the die 17, is about 0.5 to 1millimeter. The four edge portions 13 produce together with the upperedge of ythe'wall 8 a .shearing action on the sheet form; During thisshearing yac tionthe spacer 3 is gradually bulged outwardly. The spacer-3 cut out in this way has in its fiat condition and in plan view ashapeas shown in Fig. 8. It comprises .four points 14 with smallest distancefrom the spacer Center `vand four points 1S with largest distance fromthe spacer center. The diameter between opposite points I14 is onlybetween about 0.1 and 0.2 millimeters smaller 45 than the diameterbetween opposite points 15. At the points 15 the pressure of the bulgedspacer 3 against the -wall 8 is highest. It may happenthat the finishedspacer 3 which has been bulged outwardly during shearing action may bythe tensions occurring in it jerk fromthe outwardly to the inwardlybulged shape. The spacer`3 is apertured in its center portionasindicated at 9. The spacer `3 which is adapted to receive a balance orgear wheel on its upper surface with the shaft extending through theaperture yor opening 9 centers the balance or 55 ygear.Wheel kover theopening. The fabrication of the v vpartition member 3 by cutting it froma sheet of material is av considerable time-saving operation as the.handling and positioning by hand is a tedious and lengthy operation.'Furthermore'by this operation assurance is hadfthatfthe partition memberwill fit tightly inthe position set, which, of course, can be Varied .asdesired by .adjustment ofthe strokeof'the male die. i y"The cover member4 is preferably made of .paper of aweight v of ,approximately 250. gramsper square meter lmdf a thickness bet'wfeen v,0.710and'0.5Hm'illii'neters, preferably0.22`millimeter. The covermembeii'is'preferably square with rounded corners and between 10 and 40millimeters on a side, and may be printed with the manufacturers nameand identification of the stored parts. 70 The underside of the covermember 4 is coated with a solution of the same kind of polystyrene asused for the body 2 in a suitable solvent, or with a solution of acrylicplastic in styrene monomer or other suitable solvent so as to present asurface coating between 0.071 and 0.05 millimeter in thickness ofpolystyrene or acrylic plastic, and which will coalesce with thematerial of the body member 2. VThe coating may be applied by applyingthe plastic solution by a roller or by other usual methods. While it ispreferable that the cover member be made of polymer capable of beingprinted may be used if the coating may be readily adhered thereto. Thesquare shape has been chosen to provide the greatest space for theprinting of trademark and other identiiication marks. By reason of thesmall size of the parts and of the packing, it will be noted that aproblem is presented in providing ample space for the marking.

Preferably, after the watch part has been positioned inthe body member2, the cover member -4 is placed in position and the assembly placed ina jig having an open-v ing to receive the cup-shaped portion thereof.Heat is applied from the upper side of the cover member 4 duringpreferably not more than three seconds at a pressure for' instancebetween l0 and 40 kilograms per square centimeter, preferably of 25kilograms per square centimeter to the surface of the cover by a heatedsealing member having a temperature for instance between about 180 and220 centigrade, the sealing member comprising a plurality of spottingextensions each between 0.25 and 4 square millimeters in cross sectionand spaced between one and two millimeters and adapted to fuse orcoalesce sealing points 10. Other methods of sealing the cover member inposition may be used such as by applying a solvent to the coated surfaceof the cover member 4 f paper, any other suitable material such as forinstance a and/or to the upper surface of the ange 7, allowing thesolvent to partially evaporate, then placing the surfaces together andapplying pressure and/or heat to coalesce the surfaces, but care shouldbe taken not to use too much solvent as it may affect the stored parts.In order to permit breathing of the packing and to facilitate itsopening, it should be noted that the spotting extensions preferably areso located as to leave unfastened portions 11 at the centers of thesides of the ange 7. The widths of the unfastened portions 11 arebetween two and live millimeters. By reason of the small spacing of thespot fastened areas, the cover member 4 is held close to the flange 7providing a very narrow breathing space which is believed to havesomewhat of a check valve action in resisting inward iiow of air yetreadily permitting outward ow of air and vapor. The spaces are so smallas to exclude dust and moisture particles. The spaces also provide easyaccess by a pair of tweezers or other small tool to the edge of thecover member 4 so that it may be torn away to remove the stored watchparts.

It should be noted that the coating on the underside of the cover member4 reduces moisture vapor transmission as well as adding to the strengthof the cover member. However, the absorbability of the outer surface ofthe cover member is not affected, thus, it readily receives printing inkor other marking. The firm attachment of the cover member 4 to theflange 7 of the body member 2 stiffens and adds to thestrength of thecompleted packing.

From the foregoing description it will be seen that a packing for watchparts has been provided in accordance with the invention which is lightin weight, inexpensive in manufacture, and rugged in use, and whichpermits the merchandising of the watch parts in a practicallytamper-free packing which may carry the trademark and partidentification. The packing is dust and moisture resistant, and permitsthe necessary breathing to maintain the parts in good condition, thebreathing spaces also conveniently providing for access by a tool forthe easy opening of the package. Additionally, the square shapefacilitates the grouping of the packings in boxes with the tops or covermembers of opposite packings in contact. A pair of packings sopositioned is able to support the weight of a man without collapse.

It is understood that the invention is independent of any theory whichmay be advanced to account for the results obtained. Thus, while thespaces or tear openings 11 are described as for breathingj it may bethat the construction is such that only an outward flow of moisturevapor is permitted and that an inward flow of air is prevented by reasonof a check valve action of the adjoining surfaces of the flange 7 andcover 4. In any event remarkable protection of the parts is achievedunder moisture conditions, even as stated before, when the packing isimmersed in water for short periods.

While the invention has been described and illustrated with reference tospecific embodiments thereof it will be understood that otherembodiments may be resorted to without departing from the invention. Forexample, while the anged top ofthe body member has been described Vassquare in top view, it is apparent that other forms such as multi-sidedshapes, or even around shape might be used. Therefore, the form of theinvention set out above should be considered as illustrative and not aslimiting the scope of the following claims. i

I claim:

-1. The method of cutting and positioning a partition member in apacking recess having a cylindrically-shaped wall comprising placing asheet of material over a female die formed by the edge of said recess,moving a male die against the sheet of material shearing thepartition-mem- Vber -from the sheet of material against the edge of therecess by further movement of the die, and positioning the partitionmember in the desired position in the recess by further movement of thedie.

2. The mtehod of cutting and positioning a bulged partition member in apacking recess having a cylindri- Vcally-shaped wall comprising placinga sheet of material over a female die formed by said recess, providing amale die with cutting edge portions lying in a cylindrical surface andcurved in moving direction of the male die, moving the male die againstthe sheet of material shearing the partition member with unequalldiameter from the sheet of material against the edge of the recess byfurther movement of the male die, and positioning the partition memberin the desired position in the recess by further movement of the maledie.

3. The method of cutting and positioning a partition wall in a packingrecess having a cylindrically-shaped wall comprising placing a sheet ofmaterial over a female die formed by said recess, providing a male 'diewith curved `cutting edge portions each lying between two highest pointsand in a cylindrical surface, moving the male die againstthe sheet ofmaterial, gradually shearing the partition member from the sheet ofmaterial against the edge of the recess by beginning shearing withthesaid highest points by further movement of the male Ydie, andpositioning the partition member in frictional condition in the desiredposition in the recess by further movement of the male die.

References Cited in the le of this patent UNITED STATES PATENTS

